I have a Jabsco electric head Model #37010-0090 that I just bought to replace my existing jabsco electric head and I am getting seawater backup into the bowl. I have bought your book, Peggy and read the parts about putting a vented loop in the intake line between the outlet from the pump and the bowl. I have done this and I am still getting a slow increase of clear saltwater, not sewage into the bowl. It stops once I shut off the intake valve. The vented loop is about 3 feet above the water line and the toilet is about a foot above the waterline. Any suggestions would be helpfull. Thanx
Another Vented Loop Problem
- Thread starter Mike T.
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You didn't read the installation instructions...
when you installed the toilet, did you? 'Cuz they clearly show where to put the vented loop. http://www.jabsco.com/prodInfo/overview/37010-0000_ds.pdf It's only in MANUAL toilets that the vented loop goes between the pump and the bowl. My book unfortunately fails to make that distinction (although the reference to wet/dry valves is a good clue...electric toilets (except for a couple of "conversions" that only replace the pump handle) don't have wet/dry valves), but the right time to question that was when you saw a discrepancy between that and the toilet installation instructions. The intake vented loop for an ELECTRIC toilet has to go between the thru-hull and the pump, with an electric solenoid valve (Jabsco part # 37068-0000) wired to the flush button. The solenoid valve closes to prevent air from being pulled into the line that prevents the pump from priming when the toilet is flushed. It must also be at least 6-8" above waterline AT ANY ANGLE OF HEEL, so 3' above the waterline when the boat is at rest may not be high enough when underway and heeling. However, a vented loop will not prevent water from being forced up a line through an open thru-hull by the pressure of the water against the hull when the boat is underway--an effect known as "ram water"..the only solution for that is: keep the seacock closed except when the head is actually in use. Electric toilets should also be on their own separate dedicated circuit with its own breaker, shared by nothing else--not even cabin lights--that can reduce the voltage to the head if on at the same time...'cuz low voltage to the toilet causes all kinds of problems--sluggish discharge...it'll also gradually burn out the motor.
when you installed the toilet, did you? 'Cuz they clearly show where to put the vented loop. http://www.jabsco.com/prodInfo/overview/37010-0000_ds.pdf It's only in MANUAL toilets that the vented loop goes between the pump and the bowl. My book unfortunately fails to make that distinction (although the reference to wet/dry valves is a good clue...electric toilets (except for a couple of "conversions" that only replace the pump handle) don't have wet/dry valves), but the right time to question that was when you saw a discrepancy between that and the toilet installation instructions. The intake vented loop for an ELECTRIC toilet has to go between the thru-hull and the pump, with an electric solenoid valve (Jabsco part # 37068-0000) wired to the flush button. The solenoid valve closes to prevent air from being pulled into the line that prevents the pump from priming when the toilet is flushed. It must also be at least 6-8" above waterline AT ANY ANGLE OF HEEL, so 3' above the waterline when the boat is at rest may not be high enough when underway and heeling. However, a vented loop will not prevent water from being forced up a line through an open thru-hull by the pressure of the water against the hull when the boat is underway--an effect known as "ram water"..the only solution for that is: keep the seacock closed except when the head is actually in use. Electric toilets should also be on their own separate dedicated circuit with its own breaker, shared by nothing else--not even cabin lights--that can reduce the voltage to the head if on at the same time...'cuz low voltage to the toilet causes all kinds of problems--sluggish discharge...it'll also gradually burn out the motor.
Thanx Peggy
Thanx Peggy, I thought this might be the problem. Should have read the Whole instructions first. My old head didn,t have a vented loop.(Just bought the boat)1985 Hunter 40. Your book is great...Got some raritan KO and no more odors on the boat. Sprayed it on the hoses under the sinks and holding tank as well. Thanx for the quick response.. Mike s/v September Winds
Thanx Peggy, I thought this might be the problem. Should have read the Whole instructions first. My old head didn,t have a vented loop.(Just bought the boat)1985 Hunter 40. Your book is great...Got some raritan KO and no more odors on the boat. Sprayed it on the hoses under the sinks and holding tank as well. Thanx for the quick response.. Mike s/v September Winds
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